Home / 2,740.80-4,111.20-1,353.60

Finding the Fourth Proportional to 2,740.80, 4,111.20 and 1,353.60

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Solution

The fourth proportional to 2,740.80, 4,111.20 and 1,353.60 is: 2,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.80 : 4,111.20 = 1,353.60 : x
  2. Step 2: Convert to fraction form
    2,740.80/4,111.20 = 1,353.60/x
  3. Step 3: Cross multiply
    2,740.80x = 4,111.20 × 1,353.60
  4. Step 4: Simplify right side
    2,740.80x = 5,564,920.32
  5. Step 5: Solve for x
    x = 5,564,920.32/2,740.80
  6. Step 6: Final answer
    x = 2,030.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.